It takes less than 4 hours from Jinan to Weishan, and about 8 hours to go back and forth.
Tickets seem to be around 50, 5 1 is more expensive, between 50 and 80.
Accommodation is as expensive and cheap as outside.
When traveling, the day may be a little hasty. After all, the scenic spots of Weishan are still some distance away from Weishan, such as Weishan Lake, which is still far away.
Money is mainly spent on tickets and accommodation, and other aspects don't need to be considered too much, so it shouldn't cost too much.